Dam construction.



L. H. IUHGENSEN.

DAM CONSTHUCUN.

APPLICATION man umm, 1915. l

Patented Fcl. I3, 1917.

l N VEN'DGR .VSTORN EVS YVITNICSS `end beinglj connected to 0l smaller diameter inserted, the Space between the two pipes being made, tight at thel lower end of the movable pipe by mains oi a packing, and said lower end of the movable pipe servingl as a discharge for the groot inlo the large pipe and the upper a grout pump.

, A dani boil-y having one or more verti- Cal or nearly vertiealplinperorated pipes inserted in line will), theleontraetion joint and. a system of approximately horizontal pipes branching oil' from these vertical pipes, said oraneh piper,I being provided with short' slots at intervals* in line lwith the eontraetion joints, and their endA being preferably fiat- 'tened lo also form a slot in line with thel joint. p

3. A dani iody having one or more' |`apl proxiinately vertical pipes inserted in line with the eontraeuion joint and a system of horizontal, or nearly horizontal, pipes branching oil' from these vertical pipes, saidv branch pipes being provided with short sloLs at intervals in line willi the contraction joints, and their ends being llatlened lo also l'orm a alot in line with the joint, said verl/ieal pipel having' inserted movable pipes oll smaller diameter, the space, between the two pipes beingv made tight a( the lowei` end ol the movable pipe by meansA oll a paeliing, and the lower end ol the movable pipe serv# ine as a diseharge for the groot into the larger pipe, the upper end of the movable pipe beineeonneetial lo a groin; pump.

In testimony whereof l have hereunto sei' niv haml in the presenee ol' lwo snbseribin witnesses.

llllS Il. JORGICNSICN.

li'itnesses:

JoiiN ll. lliainnNo, ll". W'. l'lnALnv. 

